Notwithstanding a labor organization’s exclusive representation of employees in a unit, or the terms and conditions of any collective bargaining contract or agreement then in effect, nothing in either—

(A)

section 8(a)(1) or 8(a)(5), or

(B)

a collective bargaining contract or agreement renewed or entered into after the date of enactment of the RAISE Act,

shall prohibit an employer from paying an employee in the unit greater wages, pay, or other compensation for, or by reason of, his or her services as an employee of such employer, than provided for in such contract or agreement.